Gas-burner.



B. R. PAHROTT.

v GAS BURNER. .i APPLlcAou mso ocr. 4, V1912. l Patented Apr. 13, 1915,

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1HE MORRIS PETERS CO.. PHOTO-LITHO., wAsHlNGmN, D, C4

t sired; and to protectthe l supported'in any suitable manner.

BERT R. PARRO'IT, OF JACKSON",

MICHIGAN, ASSIGNOR TO PARROTT HEATER COMPANY, OF JACKSON, MICHIGAN, ACORPORATION OF MOHIG'AN.

GAS-BURNER.

manoir., y

Beit known-that I, Bnnfr R. FARROTT, a citizen of theV United States,residing at Jackson, in thevcounty of Jackson and State of Michigan,have invented a certain new and useful mproveinent inl Gas-Burners, ofwhich the following is a full, clear, and exact description, referencebeinghad to the accompanying drawings.

\ This inventioncrelates to gas burners for heating purposes, and thegeneral object of the invention is to provide a veryeiiicient burner ofthat type.

More particularly, one of the important objectsl is to provide a simplestructure adapted to thoroughly'mix. gas and air and give a perfectcombustion irrespective of the pressure or caloric eliiciency of thegas.

Another object is to adapt the burner, by very simple changes, 'ornatural gas, arti- ;licial gas or gasolene vapor.

Other objects are to so arrange the burner that the flame will bedirected in a most eiicient manner, concentrating the heat as de burnerfrom dirt, condensation and corrosion, thereby increasing itsefficiency. v

rFhe simplicity of the construction, enabling cheap manufacture and easyinstallation, are also features of the burner shown and claimedherein.

The invention consists of the characteristics hereinafter more fullyexplained by which the above objects, or any of them, are attained.

In the drawing, Figure l is a side elevation 'of the burner, togetherwith the shell and legs of a suitable stove or heater coactmg therewith;Fig. 2,1s a face view of one of the burner sections, that is, lookingvradially from the aXis of the annular burner; Fig. 3 is a verticalcross-section of the burner-section shown in Fig. 2; Fig.' -i isa'bottom plan of such burner section with the ends of the burner sectionhead reversed with relation to Fig. 2; Fig. 5 isan enlarged View otrapeculiar form of screen which is employed at the burning openings,the'intermediate portion of this screen'being omitted in the drawingsforsinipiicity.

Referring by numerals to the parts shown in the drawing, represents agas conduit which may be a hollow ring to which gas is supplied througha pipe ll. rlhe ring is Ars indi- Speeioaton of Letters Patent.

Patented Apr. i3, i915.

Application filed October 4V, 1912. Serial No. 723,987.

cated by Fig. l, it may be suspended below a heater casing 12 supportedon legs 13. Extending from the ring at suitable intervals' are nipplesl5 which connect with the burner sections. These nipples are spuds orbushings screwed into `bosses 16 on the upper surface oi the ring, thebushing having a bore varying'in cross section with the kind of gas itis intended to use.

The burner is made up of abutting segments which, together, have theJtorna ot a ring, each segment having a tubular leg connected with acorresponding nipple l5. The segments are designated 20 in the drawing.lin thel form shown, there are siX of them, each extending forsubstantially 60o. Each segment 20 is a hollow device having a bottom21, an outer arcual wall 22, a top composed ot the inclined portion 23and the inwardly overhanging horizontal portion 24 and ends 25 and 26.The segment has a centrally placed aperture, and surrounding thisaperture, and leading downwardly and made integral with the segment, isthe hollow leg v28. rlhe intermediateportion of the leg is shown asround, connected by a Haring liattened port 27 with the head; near itslower end the leg has a round `flaring portion, as indicated at 29, andextending crosswise ofthis lower iiared portion is an integral cross bar30, having a central opening 3l. The burner section dcscribed ispreferably a single casting.

When the burner sections are in place the upper ends of thenipples l5occupy the openings 31. rlhe nipple is shown in Fig. 3 as having itslower portion somewhat larger than the opening 31, whereby a shoulder isprovided on which the cross bar 30 rests, whereby the section issupported, while leav ing an unobstructed air space around the nipple.Below the cross bar 3() and within the leg 28 is a'circular piece oi'screen cloth 34; held in place by a partially circular ring 35 which issprung into an annular recess on the inner face of a depending andoutwardly beaded portion 36 of the leg.

When the sections are set on the nipples, the end walls of the adjacentsections abut. In this position, a tongue or dowel pin 40 on one end ofthe section occupies a corresponding recess 4l in the adjacent end ofthe next section, whereby the segments of the section are held intheirannular positions. It is simply necessary to place such sectionstobottom 21 of the make the burner ,adjustable for did'erent j Y H Forarticial gas the boresY Y l through these spuds are made comparatively Yir'whichthel burner facing may be secured.

' throughout the rarcual length.

ends of this open spacehowever, are ears.

getherto give them the annular assembly shown Vin F 1, and then thevariouslegs areshoved downwardly onto the nipples,

after vwhich the Vstructure retains its position,`

without other fastening. Y

f The frontof the segmentcasting (thatis the concave vertical side) Aisopen practically Near the 43 (Fig. '3)' projecting inwardly fromn theend walls, and 'these ears form points to rIhis .'facing consisting of aperforated screening strip 44,` preferably offbrass, 'havvinglsmallholes 45, 'andoutside of this, aV

facingV strip 46', preferably of iron and hav- Y ing much larger holes47.V Both strips are shown'as secured to the segment orA head by jscrews48 which pass through the two stripsj into the ears 43 referred to, f

The'screen 44 is formed in vz tfpeculiar ner, Vas'shown -in Fig. 5. Thatis to say, the

`perforating openings arek not round,`but are elongated or rectangular,the operation of whichis 'to spread the flamehoriz'ontally, thusconcentrating it in a yhorizontal sheet andl givinga more effectiveheating than where it flares in a.. conical formfrom a i round opening.

The spu'dsl `'15.V furnish ithermeans which kinds of gas;

large; Yfor natural gas comparatively small; and for gasolene gas they`have an intermedr ate size." These sizes are so chosenthat theAtotalarea of the bores for burners fordiHero Y ent gases isproportionaltothe heat units in Y the gas tobejconsumed. kThe actualsize of with]reference,to'thev area of cross sectionV v`of the bore 4ofthe'mixing leg, tosobtain the --tli e' openings 47 .in the facing isdetermined prcpermixture, With the bore of thespuds chosenv withreference to the 'kind of gas used, the pressure `ofsuchgas isimmaterial.

If the gas pressure is high thev gas velocity draws inzwith it "acomparatively large am'ountofair throughthe screenl. If, on` f .thelothervhand,*the gas pressure is low, the

amount of air.` 'The' proper mixture, therel fore, vis 'preserved in'any case.

slow Velocity draws a correspondingly-small changing the `nipples fordifferent kinds of gasa muchfsimp'ler-structure and operation 1s1,obtained Vthan where mixing chambers l*of djlstable-Size are employed.

vThe inward overhang of the topswalls" vof, the segments, above theburner' facings, as

shown particularly at 49 in FigsfQ, 3' and 4, is j'offimportance, as itprotects the burner from dirt, condensation 'and corrosion.V YThesegmental form of the burner andthe lockmeans ofthe dowel pins, holdsthe burner "sections iin'place when installed, but allowstheie'asyremoval of sections for clean- By simply" ing vor renewing the screensor facings or changing the face plate .for one with different orificesfor different kinds of gas.

Y The circular form of the burner concentrates the heat at the centerportion of the circle, and still allows a full supply of secondary airfrom directly below the iame. This is an important feature in eiicientheating. In connection with this, the spreading ,of the fiamef'bythelongitudinally slotted screen is valuable, the liame lying in a-thin,flat layer and thus allowing a greater amount of secondary air.

This-burner may be constructed extremely cheaply. The segment with :thehollow legs and the cross bars is preferably a single integral casting.The brass screen Vmay bje manufactured in strips, as well as the ironfacing. The lower screen at the foot of the leg is easilyY installed andeffectivelyheld in place, being clamped at the edge and lying againstthe under face of the cross bar 30 and coming between it and theshoulder of the supporting nipple.V

I claim is: y

1. In a gas burner, the combinationfof a series ofwburner sectionsarranged annularly and each consisting of a hollow segmental head and ahollow leg extending therefrom, a series of nipples for conveying gastoAthe lower portions of said legs, there being an air opening Vinto theleg about the gas inlet,

Having thus described my invention, what the inner faceV of theheadhaving an open- Y ing, a screen arranged vertically on said Y opening, a.perforated ,facingy strip, and Aimea'ns for securing the facing stripv'and 3. ,A burner section lmade o f approximately T-shape. consistingAof a vhol-low segmental o heady and a hollow leg, the leg 'communicateing with the head,` the inner curved face of the head vhaving anopening, a screen over said opening havingnarrow'horizontalperforations, and a burner facing vextending over itand having larger openings,the screen andfacing being secured to theinner face of the head.

4. A gas burner section consisting of a hollow segmental .head and ahollow leg eX- tending therefrom andhaving gas and air openings at itslower end,the inner face of meant? the head having an opening, a screenstrip across said opening having narrow horizontal perforations, afacing strip surmounting said screen and having larger openings thanthose of the screen, and an inwardly projecting iange carried by thehead and overhanging the screen and facing strip.

5. A gas burner. section of approximately T-shape, the head of which issegmental having an opening on its inner face, a `flat screen striphaving narrow horizontal burner openings and secured across said openingin the head, a surmounting strip having a series of larger openings,inwardly extending ears at each end of the burner openings, and screwsextending through said ears.

6. The combination of a gas conveying Copies of this patent may beobtained for ive cents each, by addressing the means, a series ofsectional burner members, each section having a segmental head and adepending hollow leg, means on the conveying means for engaging the legfor carrying the sectional burner members and conveying gas thereto, thehead of the sections abutting each other at their ends to form anannular core, said head having coperating lugs and recesses forinterlocking the adjoining ends with each other.

In testimony whereof, I hereunto aiiiX my signature in the presence oftwo witnesses.

BERT R. PARROTT.

Witnesses:

ALBERT H. BATES, J. B. HULL.

Commissioner of Patente,

Washington, D. C.

